<p>BIRMINGHAM | U.S. Attorney Alice Martin of Birmingham said she is sending her resignation to Washington and will step aside on Friday.</p><p>The U.S. attorney for the Northern District of Alabama</p><p>prosecuted some of the biggest public corruption cases in Alabama history and has been at the helm of the U.S. attorney's office for eight years.</p><p>The Senate Judiciary Committee is to vote on Martin's successor, Joyce Vance, on Thursday.</p>